Dish-washer.



W. R. WALKER.

DISH WASHER.

APPLICATION FILED JUNE 29, I914.

1,259,939. Patented Mar. 19, 1918.

v 2 SHEETS-SHEET I.

III I II I I l o I? l z! H I 1m I i o as I3 2 l5 W17- 5353f IVVA'NTOR Y W 7/" 2/ I I I L m r By I 4 M W. R. WALKER.

DISH WASHER.'

APPLICATION FILED JUNE 29; 1914- 1,259,939. Patented Mar. 19, 1918.

2 SHEETS-SHEET 2- Q 5,

-- I I /s I I I I I M I I w IA l2 #177! ssss: lvrslvran WILLARD B. WALKER, OF SYRACUSE, YORK.

DISH-WASHER.

Specification of Letters Patent.

Application filed June 29, 1914. Serial No. 847,965.

To all whom it may concern:

Be it known that I, WILLARD R. WALKER, a citizen of the United States of America, and a resident of Syracuse, in the county of Onondaga, in the State of New York, have invented new and useful Improveme'nts in Dish-Washers, of which the following, taken in connection with the accompanying drawings, is a full, clear, and exact descrlption. This invention relates to certain improvements in mechanical dish washers of the class set forth in my pending applications Nos. 749,133 (filed February 776,678 (filed June 30, 1913) and 811,720 (filed January 12, 1914) except that it re fers more particularly to a hand-operated rotary dasher adapted to be revolved in reverse directions one or more revolutions at a time.

The main object is to impart to a relatively shallow body of water an upward whirling centrifugal motion and to suddenly reverse this motion so as to obtain a maximum and more or less irregular splash of the water between and across the dishes or other utensils which are usually carried by open-work baskets or trays similar to those shown in my pending application No. 776,678.

Another object is to construct and associate the bottom of the vat and dasherblade in such manner as to cause an upward splashing of the water through the dishsupporting trays or baskets and to the top of the vat as the dasher-blade is rotated in either direction.

Another object is to im art to the dasher a relatively high speed 0 rotation throu h one or more complete revolutions by t emovement of the operatmg member through a comparatively short arc.

A' still further object is to make the portion of the dasher-blade nearest its axis of rotation of greater vertical width or height than its outer end so as to act upon a relatively larger volume of water in displacin it from the center outwardly under centri ugal force, thus permitting the use of a comparatively shallow bod of water in the apex of the cone bottom'with the assurance that it will be agitated and distributed throughout the whole interior capacity of the tank with the employment of paratively low degree OfPOWGI. a.

Other objects and. uses relating, to specific 8'. com

parts of the machine will be brought out in the following description.

In the drawings Figure 1 is a side elevation of a mechanical dish washer embodying the various features of my invention.

Fig. 2 is a horizontal sectional view through the vat taken on line 2-2, Fig. 1.

Fig. 3 is an enlarged longitudinal vertical sectional view of the upper portion of the machine omitting the supporting legs.

Fig. 4 is an enlarged detail sectional view of the dasher-blade. Fig. 5 is a horizontal sectional view through the outer end of the bracket carrying the counter-shaft, showing more particularly the adjustable bearing for said shaft.

This machine comprises a covered vat or tank --1 having supporting legs 2- in vided with a suitable outlet or drainage faucet 9- of the gate-type.

The raised center 7- of the bottom- 4 is provided with a gland -10 forming an'upper bearing for an upright shaft 11 having its lower end-journaled in a bracket 12-- which is secured to and depends from the bottom of the vat.

This bracket -12- also forms a support for the inner end of a horizontal countershaft -13 which is geared to the upright shaft -".11- by bevel-gears -14-.'

This counter-shaft 13- is located some distance below the bottom of the vat -1 Patented Mar. 19, 1918.

and extends radially relatively thereto, its

outer end 15- which is adjustably mounted in a vertically elongated opening -'16 in the lower end of an upri ht bracket '-17, the

y bolts -18-- to. the

latter being secured adjacent side of the vat '--1-.

A relatively large bandwheel -19- is journaled in a bearin -20+ 'on the uprightbracket 17-- tween said bracket being .journaled' in a bearing.

and the adjacent side of the vat, the hub of the wheel l9-- being extended outwardly some distance beyond the outer face of the bracket -17 and is tapered for receiving an operating handle or lever 21-- which is tightly fitted upon the tapered portion of the hub and is held in operative position by a suitable clamping bolt 22.

The arc of movement of the lever -21- and wheel '19 is limited to approximately a half circle by means of stop shoulders 23 on the bracket 17 just below the hub of the lever as shown more clearly in Figs. 1 and 3.

This wheel 19- is connected by a strap 24 and chain -25 to a relatively smaller sprocket wheel -26 on the outer end of the counter-shaft -13, the ratio of the wheels -19 and -26 being, in this instance approximately five to one, so that the movement of the lever 2lthrough an arc of 180 will revolve the shaft 11 and dasher-blade secured thereto ap proximately two and one-half complete revolutions or more than a complete revolution .at each movement of the lever through an arc of a quarter of a circle.

The lever is shown in its normal position in Fig. 1 and when in that position, the strap 24- extends around the upper half of the wheel -19'- while the chain extends around the lower half of the sprocket wheel 26, thereby avoiding the necessity of cutting sprocket teeth on the larger wheels and permitting the use of a relatively short length of chain in effecting a positive drive of the counter-shaft 13 and dasher-supporting shaft 1lin reverse directions.

The bearing -15 is provided with slotted bolt holes 27 for receiving clampin'gbolts -28 by which the bearing may be adjusted vertically and held in its adjusted position, this adjustment being effected by means of a set screw -30 which is engaged in an apertured lug 31 on the inner side of the bracket -17 as shown more clearly in Fig. 3, the object of this adjustment being to tighten the belt or release it for removal if necessary.

A dasher-blade 32- is secured to the upper end of the upright shaft -11 within the vat 1- and close to the bottom thereof and is. preferably arranged edgewise vertically-relatively to said bottom so as to extend radially from the shaft 11 across the channel '-8 and upwardly along the inclined bottom a distance greater than one-half the radius of said bottom so as to act'upon the entire body of washing gilidwhich may be placed in the bottom of e vat.

The lower edge of the blade -32- is prov vided with laterally flaring flanges 34- projecting equal distances from the center the ma n body and of substantially the between and across any plates which may be same flare so as to effect an upward movement of the water as the blade is rotated in reverse directions, the lower edge of said blade being inclined upwardly and laterally at the same angle as the bottom of the vat in close proximity thereto, leaving just suiticient clearance to avoid friction with said bottom. Y

The ,inner ends of these flanges -34 at the inner sides of the channel --8 are de- 7 flected upwardly to conform to the upper face of the conical center portion 7- and at the same time operate to assist in forcing the washing fluid at the center radially and outwardly and also upwardly. I 8

The inner end-0f the blade --32 is of greater vertical height than its outer end so as to act more effectively upon the relatively deep body of Water at the center to force the same outwardly as the blade is ro- 8 tated, .it being understood that the body of water usually employed, and indicated by the dotted lines in Fig. 3, is relatively shallow so that its normal level is some distance below the upper edge of the outer end of 9 the blade.

It is now'clear that when the blade is rotated at the relatively high speed intended, the upward inclination of the bottom of the tankand blade, together with the fiarin 91 Wings or flanges 34 at the bottom 0 said blade will impart to the water an upward whirling movement of sufiicient force to reach the top of the vat, thereby passing held edgewise in'the basket as -A- and returning by its own gravity between and across the dishes to the bottom of the tank.

It is also evident that if the direction of movement of the blade is suddenly reversed after the water has been impelled under a whirlin motion, the sudden stoppage of such whirling motion will cause the water to splash higher andwith greater force between and across the dishes which may be held in the trays and, after repeating this movement a few. times, the dishes will be thoroughly freed from accumulations, it

being understocid that the first cleansing fluid contains more or less soap or other grease solvent and that after the first cleans- Y mg, this fluid may be drawn off and a similar quantity of clean hot or cold water may be introduced and agitated in the marlin? described to finally cleanse the dishes which, when the agitation ceases, are left in the trays .to dry, the body of water being below the trays. 7

What I claim is: v

In a mechanical dish washer, the combinationof a vat having the central portion of its bottom provided with an annular channel and a raised conical portion surroundedby sald channel, an upright shaft journaled m the apex of said mused portion, 18

an impellei hlade secured to said shaft within the vat and having its lower edge provided with oppositely projecting flanges traveling close to the bottom of the vat and having their ends nearest the center inclined upwardly along the incline of the central conical portion of the bottom.

WILLARD R. WALKER.

Witnesses:

H. E. CHASE, EVA E. GREENLEAF. 

